SeaHag Mylie 1

The Sea Hag offering the Auger Shell to Mylie.

"As an immortal being, I'm afraid only you can give up your life."
—The Sea Hag to mermaid Mylie.[src]

Immortals are beings incapable of dying of natural means, the opposite of mortals. However, they can still be killed or vanquished through unnatural means like magic or physical harm.[1]

Although beings can be born immortal, some acquire immortality through other means. Immortal beings are often immune to the effects of aging or at least age at a slower rate as mortals.[2]

Obtaining Immortality

Notable Immortals

  • Mermaids cannot die unless they willingly give up their immortality and are capable of giving it up and passing it on to others through the Auger Shell.[4]
  • The Angels of Destiny and the Angel of Death play a vital part in the Grand Design. For this reason, it is believed they are true immortals.
  • Barbas could be considered a true immortal as well, as according to him "fear never dies".[5]


  1. Immortals have often been vanquished by magical powers, weapons, etc.
  2. Immortals beings can live centuries without visibly aging.
  3. "Nymphs Just Wanna Have Fun"
  4. As mentioned in "A Witch's Tail, Part 1"
  5. As stated in "A Call to Arms"